Illustrator Izumi Morino has more problems than just a lack of motivation: three of them, in fact. His brand-new stepsister, junior high school-aged Kinoko, wants to run his life. His high school crush, Kozue, is back in his life for his support—but nothing else.

And a living rag-doll who shows up in his bed one morning needs his help to discover who and what she is!